Motor pump unit



A. R. Pl-:zzlLLo 2,433,156

lo'ron Puur uui'r Filed Feb. 1s, 194i zsneets-sneqt 1 Dec. 23, 1947.

' Arr-omver.

Dec- 23. 1947 A. R. PEzzu..Lo I 2,433,156

v MOTOR PUMP UNIT Filed Feb. 12, 1947 2 Sheelfcs-Sheet 2 ATTORNEY.

Patented Dec. 23, 1947 UNITED STATES PATENT GFFICE l MOTOR PUMP UNITAlbert R. Pezzillo, Philadelphia, Pa.

Application February 12, 1947, Serial No. 728,145

2 Claims.

The object of this inventionis to kdevise a' novel motor pump unit whichcan be connected directl'y in a pipe line, which can be economicallymanufactured with a minimum of parts, which is quiet in operation, andwhich will operate for a long period of time without attention.

A further object of the invention is to devise novel iiexible mechanismfor connecting the motor housing with the pump housing.

A further object of the invention is to ldevise nove1 mechanism forconnecting the motor shaft with the impeller. y

It further comprehends a novel construction and arrangement of parts toproduce a` motor pump unit which is very compact and 'of light weight.

For the purpose of illustratingthe invention, I have shown in theaccompanying drawings a preferred embodiment of it which I have found inpractice to give satisfactory and reliable results. It is, however, tobe understood that the various instrumentalitles of which the inventionconsists can be variously arranged and organized and the invention isnot limited to the exact arrangement and organization of theseinstrumentalitics as herein set forth.

Figure 1 is a side elevation, partly in section, of a motor pump unit,embodying my invention.

Figure 2 is an end view of the pump housing with the motor removed.

Figure 3 is a sectional view, on an enlarged scale, of a flexible seal,and the impeller shaft.

Figure 4 is a top plan view with the motor removed.

Figure 5 is a transverse section of Figure 4.

Figure 6 is a sectional view of the flexible con' nection for the motorand pump housing.

.Figure is a plan view of the impeller in detached position.

Similar numerals of reference indicate corresponding parts.

Referring to the drawings:

A pump housing I is anged at its intake end as at 2 and at its dischargeend as at 3 to adapt it to be connected directly in a pipe line, Thepump housing I has an intake 4 leading to a passage 5 which curvesdownwardly and then up-` wardly to communicate with the annular, pumpchamber 6 having a tangential discharge to a discharge passage l. Theupper end of the pump housing is faced oli as at Il to form a seat for aclosure 9.

'I'he closure 9 has a depending, annular portion which is received inthe opening II of the pump housing. The pump housing has threaded tionfixed in the coupling sleeve.

2 holes I2 to receive bolts I3 which pass through the closure 9, througha sealing gasket I4 and into threaded engagement with the threaded holesto secure the closure in sealed engagement with the pump housing.

A coupling sleeve I5 is fixed to the shaft i9 of an electric motorin anyconventional manner, and a depending shaft I'I has its upperpor- 'I'hecoupling sleeve I5 has a clearance in an aperture I8 extending throughthe closure 9. The shaft I1 is mounted in a ilexible seal I9 and isconnected with an impeller 20 by a set screw 2|. IThe impeller has itslower. central portion cone shaped as at 22 to direct the incoming iiuidto the blades of the impeller, said impeller having curved recesses attheir bottoms.

The flexible seal I9 has a cup-shaped shell 23,

'within which a U-shaped packing 24 is contained and provided with aspring 25 which retains the packing in contact with the impeller shaftI1. 'Ihe shell 23 is swaged over a disc 26.

An electric motor 21 has a sectional housing,

l the sections of which arev secured in assembled condition by stay rods28. These rods 28 are in threaded engagement, at theirlower ends, withmetal sleeves 29 internally threaded at 3|! to receive the rods 23. Asseen in Figure 6, the sleeves 29 are internally threaded at 3l toreceive threaded studs 32 xed to iiexible, cushioning blocks 33. The*blocks 33 have depending, threaded studs 34 fixed to, them and securedto the pump housing by nuts 35.

The pump housing is connected in a pipe line by couplings 36 secured tothe pump housing by bolts 31 and adapted for connection in a pipe linein any desired or conventional manner, for exampe by the threaded opeingas shown in Fig-4 ure v It has been found in the development `oi! thistion due to the employment of the iiexible con` nection between themotor vhousing and pump housingv and the flexible seal for the impellerShaft.

The motor housing and the pump housing are preferably made of aluminum,magnesiuml or other light weight castings. Having thus described theinvention, what I claim as new and desire to secure by Letters Patentis:

1. In a motor pump unit, a. pump housing having an inlet, an outlet anda pumping-chamber open at its-top, a cover plate sealed with said pumphousing, closing said opening and centrally apertured, a iluidtight,flexible seal in said cover plate aperture, an impeller in the pumpingchamber, a motor having its shaft extending through said cover plateaperture with a clearance, through said seal and fixed to said impeller,said motor being positioned above said plate, and cushionlng devices ataidistance from said shaft, ex-y tending upwardly from the cover platebetween the bottom of the motor and the top of the cover plate andconstituting the sole support of the motor, and secured to the housingof said motor and to said cover plate.

2. In a motor pump unit, a pump housing having an inlet, an outlet and apumping chamber open at its top, a. cover plate closing said opening andcentrally apertured, a uidtight, flexible seal in said cover plateaperture, an lmpeller ln said pumping chamber, a motor having its shaftextending through said cover plate aperture with a clearance, throughsaid seal and fixed to said impeller, said motor being positioned aboveSaid cover plate, stay rods passing through the housing of said motor,sleeves connected with the lower ends of said stay rods, and cushioningldevices having upwardly extending studs connected with said sleeves andhaving downwardly extending studs connected with said cover plate.

ALBERT R. PEZZILLQ.

REFERENCES CITED The following references are of record ln the flle ofthis patent:

UNITED STATES PATENTS OTHER REFERENCES Bureau of Ships Manual, Chapter47, Pumps," of 1945 (pp. l.'7-1'7).

Number

